Abrasive wheel with improved composing structure

ABSTRACT

An abrasive wheel with improved structure comprises: an abrasive component, an adapting ring received by the combining hole in the central region of the abrasive component, two covers which are posited about both mounting surfaces respectively, wherein each cover at the surface thereof facing to the corresponding mounting surface has a pressing segment and a blocking segment, wherein each pressing segment comprises a plurality of teeth so that after the disclosed abrasive wheel is assembled, the blocking segment leans against the inner wall of the combining hole and the teeth of the pressing segment lean against the corresponding mounting surface, and further, a plurality of raised columns provided at the surface of each cover facing to the corresponding mounting surface and each opening defined by each two adjacent raised columns which is complementary to the shape of the raised columns so that after the disclosed abrasive wheel is assembled, the raised columns of either the cover can be engaged by the openings of the other cover.

BACKGROUND OF THE INVENTION

1. Technical Field

The present invention relates to abrasive wheels and, more particularly,to an abrasive wheel with improved composing structure.

2. Description of Related Art

FIG. 3 shows an exploded view of a conventional abrasive wheel whichcomprises an abrasive component 7, a reinforcement 8, and two covers 9,wherein the abrasive component 7 includes a combining hole 71 in thecentral region thereof for accommodating the reinforcement 8; thecombining hole 71 is provided with a plurality of retaining parts 72 onthe peripheral wall thereof; and the two covers 9 contain a plurality ofcombining tongues 91 for matching plural intervals 73 between each tworetaining parts 72 of the combining hole 71 to attach the two covers 9to the combining hole 71 at both sides thereof respectively; wherebywhen an abrasive machine drives one of the two covers 9 to rotate, thecombining tongues 91 thereof in turn give an impetus to the retainingparts 72 and the abrasive component 7 is therefore pushed to rotate.

However, the structure of said covers 9 is complicated and requires acorrespondingly complicated mold that is relatively difficult to bedevised to produce the covers 9. Furthermore, it is essential to arrangethe reinforcement 8 in the combining hole 71 to reinforce the component7 for preventing the abrasive component 7 from unduly deforming underthe operating force during a user's operation.

Nevertheless, the necessity of the reinforcement 8 can significantlyraise the manufacturing costs; also it requires additional difficultyand steps of fabrication. Hence, a need exists for an improvement in thestructure of abrasive wheels.

Further, since it is the combining tongues 91 of the covers 9 pushingthe retaining parts 72 that rotate the abrasive component 7, stressconcentration may detrimentally arise at the contacting areas of theretaining parts 72 and combining tongues 91. After lasting operation,said stress concentration may incur deformation of the retaining parts72, and as a consequence, the matching relationship between theretaining parts 72 and combining tongues 91 may deteriorate whichfinally causes breakage of the combining tongues 91.

SUMMARY OF THE INVENTION

The present invention has been accomplished under the circumstances inview. It is the main object of the present invention to provide anabrasive wheel with improved composing structure that is easy to befabricated and retrenches manufacturing costs by simplifying thecomponents as well as structure thereof.

To achieve these and other objects of the present invention, theabrasive wheel comprises:

an abrasive component, which has a combining hole and an abrasivesegment circling the outer periphery of said combining hole;

an adapting ring received by the combining hole of the abrasivecomponent that has an inner wall circling the combining hole and twomounting surfaces at the both sides thereof respectively;

two covers which are posited about the both mounting surfacesrespectively, wherein each cover at the surface thereof facing to thecorresponding mounting surface has a pressing segment and a blockingsegment, wherein each pressing segment circles the outer periphery ofsaid blocking segment and comprises a plurality of teeth so that afterthe disclosed abrasive wheel is assembled, each of the blocking segmentslean against the inner wall of the combining hole and the teeth of eachpressing segment lean against the corresponding mounting surface; and

a plurality of raised columns provided at the surface of each coverfacing to the corresponding mounting surface and each opening defined byeach two adjacent raised columns which is complementary to the shape ofthe raised columns so that after the disclosed abrasive wheel isassembled, the raised columns of either said cover can be engaged by theopenings of the other cover.

BRIEF DESCRIPTION OF THE DRAWINGS

The novel features believed characteristic of the invention are setforth in the appended claims. The invention itself, however, as well asa preferred mode of use, further objects and advantages thereof, willbest be understood by reference to the following detailed description ofan illustrative embodiment when read in conjunction with theaccompanying drawings, wherein:

FIG. 1 is an exploded view of the abrasive wheel according to thepresent invention;

FIG. 2 is a schematic drawing showing the structure of the abrasivewheel according to the present invention; and

FIG. 3 is an exploded view of a conventional abrasive wheel.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Please refer to FIGS. 1 to 2 for a preferred embodiment of the presentinvention. It is to be understood that the recited embodiment is for thepurpose of illustration and not intended to limit the present inventionwith the discussed structure.

According to this embodiment of the present invention, the abrasivecomponent comprises

an abrasive component 1, which has a combining hole 11 and an abrasivesegment 12 circling the outer periphery of said combining hole 11;

an adapting ring 2 received by the combining hole 11 of the abrasivecomponent 1 that has an inner wall 21 circling the combining hole 11 andtwo mounting surfaces 22 at the both sides thereof respectively;

two covers 3 which are posited about the both mounting surfaces 22 ofthe adapting ring 2 respectively, wherein each cover 3 at the surfacethereof facing to the corresponding mounting surface 22 has a pressingsegment 31 and a blocking segment 32, wherein each pressing segment 31circles the outer periphery of said blocking segment 32 and comprises aplurality of teeth 311 so that after the disclosed abrasive wheel isassembled, the teeth 311 of each said pressing segment 31 lean againstthe corresponding mounting surface 22, wherein according to thisparticular embodiment, the teeth 311 of each said pressing segment 31are centripetally arranged against the center of each cover 3 with spacebetween each two adjacent teeth 311; and

a plurality of raised columns 33 provided at the surface of each cover 3facing to the corresponding mounting surface 22 and each opening 34defined by each two adjacent raised columns 33 which is complementary tothe shape of the raised columns 33 so that after the disclosed abrasivewheel is assembled, the raised columns 33 of either said cover 3 can beengaged by the openings 34 of the other cover 3.

Since each said blocking segment 32 of each said cover 3 adequatelysupports the adapting ring 2 at the inner wall 22 thereof, itfacilitates preventing the adapting ring 2 from deformation so that areinforcement implemented in the prior art can be dispensed with. Thus,when using the disclosed subject matter, the components of the abrasivewheel can be advantageously simplified and the manufacturing coststhereof can be in turn reduced.

Besides, a through hole 35 is provided at the center of each said cover3 that comprises a reduced diameter section 351 and a magnified diametersection 352. Further combined to the two covers 3 are a first lockingmember 4 having a treaded portion 41 and a magnified head portion 42whose diameter is greater that that of the reduced diameter section 351,and a second locking member 5 having a plurality of prismatic surfaces51 at the outer periphery thereof. To fabricate the disclosed abrasivewheel, the portion 41 of the first locking member 4 is pierced throughone of said covers 3 to screw into the second locking member 5 which isfixed in the reduced diameter section 351 of the other cover 3 wherebythe two covers 3 are oppositely closed toward each other. In fact, thesecond locking member 5 is further fastened to an existing abrasivemachine.

After the disclosed abrasive wheel is composed, the teeth 311 of thepressing segment 31 press against the corresponding mounting surface 22of the adapting ring 2 wherein the hardness of the pressing segments 31of the covers 3 is greater than that of the adapting ring 2, so thatwhen either the cover 3 is rotated, the abrasive component 1 thatcombined with the adapting ring 2 can in turn be driven to rotatesynchronously.

Moreover, as the teeth 311 of the pressing segment 31 press against thecorresponding mounting surface 22 of the adapting ring 2, the covers 3and the adapting ring 2 can be retained mutually without the worry ofbecoming unfastened, and in the meantime, attrition of the pressingsegment 31 can be minimized to ensure the service life thereof.

Although a particular embodiment of the invention has been described indetail for purposes of illustration, it will be understood by oneordinarily skilled in the art that numerous variations will be possibleto the disclosed embodiments without going outside the scope of theinvention as disclosed in the claims.

1. An abrasive wheel with improved composing structure, which comprises:an abrasive component having a combining hole and an abrasive segmentcircling an outer periphery of said combining hole; an adapting ringreceived in the combining hole of the abrasive component, said adaptingring having an inner wall circling the combining hole and two mountingsurfaces respectively disposed on opposing sides thereof; two coversrespectively posited adjacent each mounting surface of the adaptingring, wherein each cover has a surface facing a corresponding mountingsurface of the adapting ring, each cover has a pressing segment and ablocking segment, wherein said pressing segment circles an outerperiphery of said blocking segment and includes a plurality of teeth,the blocking segment presses on the inner wall of the adapting ring andthe teeth of the pressing segment press on the corresponding mountingsurface; and a plurality of raised columns extending from the surface ofeach cover facing the corresponding mounting surface of the adaptingring in spaced angular relationship, a plurality of openings beingrespectively disposed between said plurality of raised columns, saidopenings being respectively shaped complementary to a shape of theraised columns, whereby after the abrasive wheel is assembled, theraised columns of each said cover are respectively engaged in theopenings of the other cover.
 2. The abrasive wheel with improvedcomposing structure as claimed in claim 1, wherein the teeth of saidpressing segment are arranged to extend radially from an outer peripheryof said blocking segment of each cover with a space being disposedbetween adjacent teeth.
 3. The abrasive wheel with improved composingstructure as claimed in claim 1, wherein a through hole is provided at acenter of each said cover that comprises a reduced diameter section andan enlarged diameter section; a first locking member having a threadedportion and an enlarged head portion having a diameter larger than thatof the reduced diameter section, and a second locking member having aplurality of prismatic surfaces at an outer periphery thereof arerespectively combined to the two covers, whereby the threaded portion ofthe first locking member is inserted through one of said covers to screwinto the second locking member which is fixed in the reduced diametersection of the other of said covers to secure the two covers to eachother.